package com.cycle.community.controller;

import com.cycle.community.constant.CommunityConstant;
import com.cycle.community.constant.HttpConstant;
import com.cycle.community.entity.*;
import com.cycle.community.event.EventProducer;
import com.cycle.community.service.CommentService;
import com.cycle.community.service.DiscussPostService;
import com.cycle.community.service.LikeService;
import com.cycle.community.service.UserService;
import com.cycle.community.util.CommunityUtil;
import com.cycle.community.util.HostHolder;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;

import java.util.*;

/**
 * @author lenovo
 * @create 2022/8/14 21:01
 */
@Controller
@RequestMapping("/discuss")
public class DiscussPostController implements CommunityConstant {
    @Autowired
    private DiscussPostService discussPostService;

    @Autowired
    private CommentService commentService;

    @Autowired
    private HostHolder hostHolder;

    @Autowired
    private UserService userService;

    @Autowired
    private LikeService likeService;
    @Autowired
    private EventProducer eventProducer;


    @RequestMapping(path = "/add", method = RequestMethod.POST)
    @ResponseBody
    public String addDiscussPost(String title, String content) {
        User user = hostHolder.getUser();
        if (user == null) {
            return CommunityUtil.getJSONString(HttpConstant.HTTP_FORBIDDEN, "你还没有登录哦！");
        }
        DiscussPost post = new DiscussPost();
        post.setUserId(user.getId());
        post.setTitle(title);
        post.setContent(content);
        post.setCreateTime(new Date());
        discussPostService.addDiscussPost(post);//mybatis-plus会返回id给post
        //触发发帖事件
        Event event = new Event()
                .setTopic(TOPIC_PUBLISH)
                .setUserId(user.getId())
                .setEntityType(ENTITY_TYPE_POST)
                .setEntityId(post.getId());
        eventProducer.fireEvent(event);

        //报错情况，将来统一处理
        return CommunityUtil.getJSONString(HttpConstant.OK, "发布成功！");
    }

    @RequestMapping(path = "/detail/{discussPostId}", method = RequestMethod.GET)//返回模板
    public String getDiscussPost(@PathVariable("discussPostId") long discussPostId, Model model, Page page) {
        //帖子
        DiscussPost post = discussPostService.findDiscussPostById(discussPostId);
        model.addAttribute("post", post);
        //通过userId找User，一种管理查询(效率高，一次两张表，但是耦合)，一种用userId找User(TODO 后面通过redis有效率影响的数据直接缓存)
        //作者
        User user = userService.findUserById(post.getUserId());
        model.addAttribute("user", user);
//        TODO帖子的详情还缺回复  已经完成
        //点赞数量
        long likeCount = likeService.findEntityLikeCount(ENTITY_TYPE_POST, discussPostId);
        model.addAttribute("likeCount", likeCount);
        //点赞状态，要判断用户是否登录，都可以看到
        int likeStatus = hostHolder.getUser() == null ? 0 :
                likeService.findEntityLikeStatus(hostHolder.getUser().getId(), ENTITY_TYPE_POST, discussPostId);
        model.addAttribute("likeStatus", likeStatus);


        //评论分页信息
        page.setLimit(5);
        page.setPath("/discuss/detail/" + discussPostId);
        page.setRows(post.getCommentCount());

        //评论：给帖子的评论
        //回复：给评论的评论 看是直接对层主回复还是对层主层里面的人进行回复
        //评论列表
        List<Comment> commentList = commentService.findCommentsByEntity(
                ENTITY_TYPE_POST, post.getId(), page.getOffset(), page.getLimit());
        //view object
        //评论VO列表
        List<Map<String, Object>> commentVoList = new ArrayList<>();
        if (commentList != null) {
            for (Comment comment : commentList) {
                //Map:一个评论的VO
                Map<String, Object> commentVo = new HashMap<>();
                //评论
                commentVo.put("comment", comment);
                //作者
                commentVo.put("user", userService.findUserById(comment.getUserId()));
                //点赞数量
                likeCount = likeService.findEntityLikeCount(ENTITY_TYPE_COMMENT, comment.getId());
                commentVo.put("likeCount", likeCount);
                //点赞状态
                likeStatus = hostHolder.getUser() == null ? 0 :
                        likeService.findEntityLikeStatus(hostHolder.getUser().getId(), ENTITY_TYPE_COMMENT, comment.getId());
                commentVo.put("likeStatus", likeStatus);

                //回复列表 0, Integer.MAX_VALUE 表示查全部
                List<Comment> replyList = commentService.findCommentsByEntity(ENTITY_TYPE_COMMENT, comment.getId(), 0, Integer.MAX_VALUE);
                //回复VO列表
                List<Map<String, Object>> replyVoList = new ArrayList<>();
                if (replyList != null) {
                    for (Comment reply : replyList) {
                        Map<String, Object> replyVo = new HashMap<>();
                        //回复
                        replyVo.put("reply", reply);
                        //作者
                        replyVo.put("user", userService.findUserById(reply.getUserId()));
                        //回复的目标
                        User target = reply.getTargetId() == 0 ? null : userService.findUserById(reply.getTargetId());
                        replyVo.put("target", target);
                        //点赞数量
                        likeCount = likeService.findEntityLikeCount(ENTITY_TYPE_COMMENT, reply.getId());
                        replyVo.put("likeCount", likeCount);
                        //点赞状态
                        likeStatus = hostHolder.getUser() == null ? 0 :
                                likeService.findEntityLikeStatus(hostHolder.getUser().getId(), ENTITY_TYPE_COMMENT, reply.getId());
                        replyVo.put("likeStatus", likeStatus);
                        replyVoList.add(replyVo);
                    }
                }
                commentVo.put("replys", replyVoList);

                //回复数量
                int replyCount = commentService.findCommentCount(ENTITY_TYPE_COMMENT, comment.getId());
                commentVo.put("replyCount", replyCount);
                commentVoList.add(commentVo);
            }
        }
        model.addAttribute("comments", commentVoList);
        return "/site/discuss-detail";
    }


}
